Disazo pigments

ABSTRACT

DISAZO DYESTUFFS OF THE FORMULA   Y-R2-NH-CO-R1(-OH)-N=N-A1-X-A2-N=N-R1(-OH)-CO-NH-R2-Y   IN WHICH A1, A2 AD R2 EACH REPRESENTS AN ARYLENE RESIDUE, R1 REPRESENTS A NAHTHALENE RESIDUE IN THICH THE AZO, HYDROXY AND CARBOXYLIC ACID AMIDE GROUP ARE RESPECTIVELY IN 1,2,3-POSTION, X REPRESENTS A DIRECT BOND OR A BRIDGING GROUP AND Y REPRESENTS A GROUP OF THE FORMULA   -NHCOR3   OR -CONHR4 IN WHICH R3 REPRESENTS A HYDROGEN ATOM OR AN ALKYL, ARYL, ALKOXY, AMINO, ALKYLAMINO OR ARYLAMINO GROUP AND R4 REPRESENTS A HYDROGEN ATOM OR AN ARYL GROUP ARE VALUABLE PIGMENTS WHICH COLOR PLASTIC MASSES IN VIOLET TO BLUE SHADES OF GOOD FASTNESS TO LIGHT AND MIGRATION.

DISAZO PIGMENTS Willy Mueller and Karl Rouco, Riehen, Switzerland, as-

siguors to Ciba Limited, Basel, Switzerland, a company of Switzerland 'we No Drawing. Filed'Feb. 26, 1968, Ser. No. 701,953

Claims ,priority, appl ication Switzerland, Mar. 16, 1967, i

- -3,859/67 7 Int. o1. c091; 33/02 US. Cl. 260--181 10 Claims ABST' RACT OF THE DISCLOSURE Disazo dyestutfs of the formula v V 1 N=N.- A'1-,x-A,-N=N

n1 n I ia-OH GONE- y ooNH-m-Y in which A A and'R each represents an arylene residue, R represents a naphthalene residue in which the azo, hydroxy and carboxyl icacid amide group are respectively in 1,2,3-position, Xrepresents a direct bond or a bridging group and Y represents a group of the formula or C0N-HR 'in which R represents a hydrogen atom or an alkyl, aryl, alkoxy, amino, alkylamino or arylamino group and R represents a hydrogen atom or an aryl group are valuable pigments'which color plastic masses in violet to blue shades of good fastness to light and migration.

The present'invention is based on the observation that valuable disazo pigmentsof the formula in which A A and R each represents an arylene residue, R represents a naphthalene residue in which the azo, hydroxy and carboxylic acid amide :groups are in 1,2,3- position re spe .ctively, Xrepresents a direct bond or a bridging group anjdfY represents a group of the formula NHCOR or CONHR in which R represents a hydrogen atom or an alkyl, aryl, alkoxy, amino, alkylamino or arylamino group and R represents a hydrogen atom or an aryl group, may be obtained by coupling a tetrazoamino compound of an arylenediamine of the formula is preferably one corresponding the formula 1 v in which A A and X have the meanings given above andR and R each represents an alkyl residue, or R 'and'R ftog ether with'the nitrogen atom may form a heteroy l g H 3,555,004 Patented Jan. 12, 1971 Compounds that are of special interest are (a) arylenetetrazo'amino compounds of the formula in which R and R have the meanings given above and Z and 2;, each represents a hydrogen or a halogen atom or an alkyl or alkoxy group, or (b) arylenetetrazoamino compounds of the formula in which R and R have the meanings given above, B and B each represents a phenylene residue that may be substituted by halogen atoms or alkyl or alkoxy groups and X represents an oxygen or a sulphur atom or an NH, sulphone, carbonyl, azo, alkylene, CONH-,

-COCO, NHCONH, oxidiazole or thiadiazole group, or (c) arylenetetrazoamino compounds of the formula in which R and R have the meanings vgiven above, B represents a phenylene group that may be substituted by halogen atoms or alkyl or alkoxy groups, B represents a saturated or unsaturated hydrocarbon residue or a phenylene residue that may be substituted by halogen atoms or alkyl or alkoxy groups and X represents a -CONH, NHCO- or SO NH- group.

The arylenetetrazoamino compounds to be used in accordance with the process of the invention may be obtained in known manner by coupling an arylenetetrazonium salt with a primary or preferably a secondary amine. A very wide variety of amines are suitable for this purpose, for example, aliphatic amines, for example, methylamine, ethylamine, ethanolamine, propylamine, isopropylamine, butylamine, hexylamine and especially dimethylamine, diethylamine, methylethanolamine, dipropylamine, diisopropylamine or dibutylamine, aminoacetic acid, N-methylaminoacetic acid, butylaminoacetic acid, aminoethanesulphonic acid, N-methylaminoethanesulphonic acid, guanylethanesulphonie acid and p-aminoethylsulphuric acid; alicyclic amines, for example cyclohexylamine, N-methylcyclohexylamine and dieyclohexylamine; aromatic amines, for example, 4-aminobenzoic acid, sulphanilic acid, 4-sulpho-2-aminobenzoic acid, 4- sulphophenylguanidine, 4-N-methylaminobenzoie acid, 4- N-ethylaminobenzoic acid, 1 aminonaphthalene-4-sulphonic acid, and 1 aminonaphthalene-2,4-disulphonic acid; heterocyclic amines, for example, piperidine, morpholine, pyrrolidine and dihydroindole; and also sodium cyanamide or dicyandiamide.

The tetrazoamino compounds obtained are usually sparingly soluble in cold water and, if necessary, may be isolated from the reaction medium in a crystalline form by salting out. In many cases the moist press-cake may be used as it is for further reactions. In some cases it may be advantageous to dehydrate the tetrazoamino com- Preferred coupling components are naphthols of the formula in which R; has the meaning given above, X; represents a hydrogen or a halogen atom or an alkoxy group and Y and Y each represents a hydrogen or a halogen atom or an alkyl or alkoxy group, or naphthols of the formula mmiiim v in which X has the meaning given above, R represents a hydrogen atom or a phenyl residue that may be substituted, V represents a hydrogen or a halogen atom or an alkyl group and n stands for l or 2.

. The above-mentioned naphthols may be obtained by condensing a halide, for example, of 2,3-hydroxynaphthoic acid, 6-bromo-2,3-hydroxynaphthoic .acid or 6- metho -2,3-hydroxynaphthoic acid, with an amine of the formula Y1 l HzN-O-NHOCRa The following amines are given as examples: 4-formylaminoaniline, 4 acetylaminoaniline, 4 propionylaminoaniline, 4-butyrylaminoaniline, 4-chloroacetylaminoaniline, 4-trichloroacetylaminoaniline, 4-phenoxyacetylaminoaniline, 4-crotonylaminoani1ine, 4-cinnamoylaminoaniline, 4-carbomethoxyaminoaniline, 2-methyl-4-acetylaminoaniline, Z-chloro 4 acetylaminoaniline, 2-methoxy-4- acetylaminoaniline, 2,5 dimethyl-4-acetylaminoaniline, 2,S-dimethyl-4-formy1amin0aniline, 2,5-dimethyl 4 cinnamoylaminoaniline, 2,5-dimethyl 4 nicotinylaminoaniline, 2,5-dimethy1 4 thiophene-l'-carbonylaminoaniline, 2,5-dimethyl 4 carbethoxyaminoaniline, 2,5-dichloro-4- acetylaminoaniline, 2,5-dichloro 4 cinnamoylaminoaniline, 2,5-diethoxy-4-acetylaminoaniline, 2,5-dimethoxy-4- acetylaminoaniline, 2 chloro-5-methyl-4-acetylamin0aniline, 2 chloro-S-methoxy-4-acetylaminoaniline, 4-aminophenylurea, N-methyl-N-4-aminophenylurea, N dimethyl-N',4-aminophenylurea, 4-amino 2,5 dimethylphenylurea, 4-amino-2,S-dichlorophenylurea, 4amino-2-methylphenylurea, 4-amino-2-chlorophenylurea, 4-amino-2-methoxyphenylurea, 4-amino-2-chloro-5-methoxyphenylurea, 4-amino-2-methoxy-5-chlorophenylurea, 4-amino-2-methyl-S-chlorophenylurea, 4-amino-2-chloro-5-methylphenylurea, 4-amino-2-trifluoromethylphenylurea, 4-amino-2,5- dimethoxyphenylurea, 4-amino 2,5 diethoxyphenylurea, 4-amino-2-bromophenylurea, 4 amino-4'-chlorodiphenylurea, 4-amino-4'-methyldiphenylurea, 4 amino 4' methoxydiphenylurea, 4-amino 2' methyldiphenylurea, 4- amino-2,S-dimethyldiphenylurea, 4-an1ino 2,5 dimethyl- 4'-chlorodiphenylurea, 4 amino-2,5,4-trimethyldiphenylurea, .4-amino-2,S-dichlorodiphenylurea, 4-amino-2,5,4- trichlorodiphenylurea, 4 amino-2-methyl-5-chlorodiphenylurea, 4-amino-2-methoxy-5-chlorodiphenylurea, 4-amino 4' carbomethoxydiphenylurea, 3-aminobenzoic, acid anilide, 3-aminobenzoic acid-4'-chloroanilide, S-aminobenzoic acid-4-methoxyanilide, 3-aminobenzoic acid-3'- trifluorom'et-hylanilide, 3-amino-4-chlorobenzoic acid anilide, 3-amin0-4-chlorobenzoic acid-4-chloroanilide, 3- amino-4-chlorobenzoic acid-3'-trifluoromethylanilide, 3- amino-4-chlorobenzoic acid-2',5-diehloroanilide, 3-amino-4methylbenzoic acid anilide, 3-amino-4-methoxybenzoic acid anilide, 3-amino4-ethoxybenzoic acid anilide, 3-amino-4-phenoxybenzoic acid anilide, 3-amino-4-carbomethoxybenzoic acid anilide, 3-amino-4,6-dichlorobenzoic acid anilide, 4-amin0benz0ic acid anilide, 4-aminobenzoic acid 4' chloroanilide, 4-aminobenzoic acid-4- methylanilide, 4 aminobenzoic acid-4'-methoxyanilide,- 4- aminobenzoic acid-3'-trifiuoromethylanilide, 4-aminobenzoic acid 2','4' dichloromethylanilide, 4 aminobenzoic acid 2',5' dichloromethylanilide, 4 aminobenzoic acid- 2',4',5-trichloroanilide, 4-aminobenzoic acid 3,5' bistrifluoromethylanilide, 4-aminobenzoic acid-2-chloro-5- trifiuoromethylanilide, 4-aminobenzoic acid-2,5'-dimethylanilide, 3-methyl-4-aminobenzoic acid anilide, 3-methyl- 4-aminobenzoic acid-4'-chloroanilide, 3-methyl-4-aminobenzoic acid-2',4'-dichloroanilide, 3 methyl-4-aminobenzoic acid-2',5-dichloroanilide, 3-methyl-4-aminobenzoic acid-2'-chloro-S'-trifiuoromethylanilide, 4-aminodiphenyl- 4'-carboxylic acid amide, 4-aminodiphenyl-4'-carboxylic acid methylamide, 4-aminodiphenyl 4' carboxylic acid anilide, 4-aminodiphenyl-4-carboxylic acid-4"-chloroanilide, 4-aminodiphenyl-4'-ca1'boxylic acid-2",5"-dichloro anilide, 4 aminodiphenyl 4 carboxylic acid-2",5"-dimethylanilide and 4-aminodiphenylurea.

Coupling of the tetrazoamino compound with the naphthol is advantageously effected in an organic solvent, for example, chlorobenzene, ortho-dichlorobenzene, nitrobenzene, pyridine, quinoline, ethylene glycol, ethylene glycol monomethylether, ethylene glycol monoethylether, dimethylformamide, N-methylpyrrolidone, formic acid or acetic acid.

Generally, it is not necessary to use the tetrazoamino compounds in an anhydrous form. For example, the water-moist filter capes may be used. Splitting of the tetrazo amino compound, which precedes couplien, is advantageously effected in an acid medium. When a neutral solvent is used, the addition of an acid, for example, hydrogen chloride, sulphuric acid, formic acid or acetic acid, can be of advantage.

Coupling is advantageously carried outwith the application of heat, preferably at a temperature within the range of from 60 to C., and it generally proceeds quickly and is complete.

By virtue of their insolubility, the pigments obtained can be isolated from the reaction mixture by filtration. Because the by-products remain in solution, the pigments are obtained in a very pure state. An after-treatment with organic solvents, which is necessary in the case of pigments produced by coupling in an aqueous medium, is superfluous in most cases. Further advantages of the process of the invention are the high yields, the fact that the pigments are obtained in a form suitable for direct use and that the tinctorial properties of the pigments are constant.

By virtue of their advantageous properties, the pigments obtained in accordance with the process of the invention may be used for a very wide variety of purposes. For example, they may be used in a finely divided form for the spin-coloration of filament and staple-fibre viscose, cellulose ethers, cellulose esters, polyamides, polyurethanes and polyesters, and also in the production of coloured lacquers and lake-formers, solutions or products made from cellulose acetate, nitrocellulose, natural or synthetic resins, for example, polymerization resins or condensation resins, for example, aminoplasts, alkyd resins and phenoplasts, and also polyolefins, for example, polystyrene, polyethylene and polypropylene, polyvinyl chloride, polyacrylonitrile, rubber, casein, silicones and silicone resins. They may also be used advantageously in the manufacture of coloured pencils, cosmetic preparations and laminated sheet material.

The following examples illustrate the invention. Unless otherwise stated, the parts and percentages are by weight.

TABLEKJonItinued I II III IV 36 3,3-dimethoxy-4,4-diaminodiphenyl Morpholine 6-b1;;)i1l11 g-2-hydroxy3-naphth0ic aeid-4-benzoylam.ino- Reddish blue.

at e.

37 3,3-dimethoxy-G,6'-dichloro-4,4- n ..dn Do.

diaminodiphenyl.

38 3,3-d1methoxy-4,4-d1am1nod1phenyl do 6-metlhgxy-2-hydroxy-3-naphthoic acid-4-benzoylamino- Blue black.

anu e.

39 do do 6-nitro-2-hydroxy-3-naphthoic acid-4'43enzoylaminoanilide... Blue.

EXAMPLE 2 inthe formulae indicated, -R Y represents a group of A mixture is prepared from 65 parts of stabilized polyvinyl chloride, 35 parts of dioctyl phthalate and 0.2 part of in which A is a radical of the formulae B--XB' or BX B -X -B'-- in which B, B and B each represents unsubstituted phenylene or phenylene substituted by chlorine, bromine, trifluoromethyl, lower alkyl or lower alkoxy, X represents a direct bond, an oxygen or a sulphur atom or an NH. sulphone, carbonyl, -CONH, SO2NH --NHCONH or a group, X is hydrogen, bromine or methoxy, R is unsubstituted phenylene or phenylene substituted by chlorine, bromine, lower alkyl or lower alkoxy and Y represents a group of the formula --NHCOR or -CONHR in which R and R represent unsubstituted phenyl radithe formula in which R represents hydrogen, phenyl, or substituted phenyl, wherein the substituent is chlorine, bromine, lower alkyl, lower alkoxy, or trifiuoromethyl, V represents hydrogen, chlorine, or lower alkyl and n stands for l or 2.

3. A disazo pigment as claimed in claim 1 in which, in the formulae indicate, -R Y represents a group of the formula in which Y and Y each represents hydrogen, chlorine, lower alkyl or lower alkoxy.

4. A disazo pigment as claimed in claim 1 wherein A iS 5. A disazo pigment as claimed in claim 1 wherein A is BXB'.

6. A disazo pigment of claim 1 of the formula I I H OO F in which Z and Z each represents hydrogen, chlorine, lower alkyl or lower alkoxy.

7. The compound as claimed in claim 1 of the for cals or phenyl radicals substituted by chlorine, bromine, mula OHsIO (Ill HO lower alkyl, lower alkoxy or trifluoromethyl.

2. A disazo pigment as claimed in claim 1 in which,

CHBO

OCHa

II II 8. The compound as claimed in claim 1 of the formula (I)CHa 9. The compound as claimed in claim 1 of the formula CHaCI) 90H: C N II II N (11 HO OH ('31 I" 3 I I CFs CF;

10. The compounds as claimed in claim 1 of the formula CH3? OCH;

References Cited UNITED STATES PATENTS 3,366,623 1/1968 Ronco 260203 CHARLES B. PARKER, Primary Examiner D. M. PAPUGA, Assistant Examiner US. Cl. X.R.

mg UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,555,00 Dated January 12, 97

Inventor) Willy Mueller et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 10, in the formula of claim 2, delete "Y" and substitute V Columns 11-12, in the right-hand portion of the formula of claim 9 should be CF CF Column 12, in the right-hand portion of the formula of claim 10 ll should be n Signed and sealed this 15th day of February 1972.

(SEAL) L Attest:

EDWARD M.FLETCHER,JR. ROBERT GOT'ISCHALK Attesting Officer Commissioner of Patents 

